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Due to its pulsed operation mode, a fusion device has to sustain thermal stresses and be exposed to a flux of 14 MeV neutrons at the same time. In order to simulate this irradiation condition, a new irradiation device has been developed, in which the specimen can be stress and strain controlled during the irradiation. For the simulation of the fusion neutrons, a 590 MeV proton beam is used. This type of particle produces from spallation reactions the displacement damage and the helium typical of fusion neutrons in the material. This paper investigates the influence of the in situ deformation on the low cycle fatigue of a 12 % Cr ferritic-martensitic steel (MANET II). The results are compared with results from non-irradiated specimens and from specimens tested after irradiation to the same end-of-life fluence. The effects of the different conditions are reported for a temperature T(Test) = T(Irr) = 573 K and a total imposed strain of 0.7 %.

Additional information

Authors: MARMY P, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne (CH)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 212-215 (1994) pp. 594-598
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